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NTK
Direct Fit Oxygen SensorNTK 21548 Oxygen Sensor - Downstream Left or Downstream Right
| Brand | NTK 21548 |
|---|---|
| Position | Downstream Left |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 18.000 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 22.7500 |
| Product line | Direct Fit Oxygen Sensor |
| Fits | Chevrolet, GMC, Pontiac, Saturn, and Cadillac · 66 vehicles |
Direct fit replacement. Specific-fit oxygen sensor for straightforward installation.
Heated sensor. Helps the sensor reach operating temperature quickly.
Threaded mounting. Installs with a secure, threaded connection.
Cross-references Bosch 15468, Bosch 15901 and Delphi ES20134 for the same application. See all 16.
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Direct Fit Oxygen Sensor for GM Applications
NTK 21548 is a heated, direct fit oxygen sensor built for specific downstream applications on select Chevrolet, GMC, Cadillac, Pontiac, and Saturn vehicles. It uses a threaded mounting design with a 4-wire configuration and a 22.75-inch harness length for OE-style replacement on the listed vehicles.
As part of the NTK Direct Fit Oxygen Sensor line, this sensor is engineered for original equipment equivalent fit, form, and function. NTK applies ceramic manufacturing expertise and extensive production testing to help deliver consistent signal performance and reliable emissions-system operation.
Key Features
- Part number: 21548
- Heated oxygen sensor for downstream placement
- Specific fit design for listed GM and related applications
- 4-wire construction with 22.7500 wiring harness length
- 18.000 thread diameter with threaded mounting type
- OE-equivalent design for direct replacement service
Fitment Details
- Fits 2007 Chevrolet Silverado 1500 HD Classic, downstream left.
- Fits 2007 Chevrolet Silverado 2500 HD Classic, downstream left.
- Fits 2007 Chevrolet Silverado 3500 Classic, downstream left.
- Fits 2007 Chevrolet Silverado 3500 HD, downstream left.
- Fits 2007 GMC Sierra 1500 HD Classic, downstream left.
- Fits 2007 GMC Sierra 2500 HD Classic, downstream left.
- Fits 2007 GMC Sierra 3500 Classic, downstream left.
- Fits 2007 GMC Sierra 3500 HD, downstream left.
- Fits 2007 Pontiac G6, downstream right.
- Fits 2007 Saturn Aura, downstream right.
- Fits 2004-2006 Cadillac Escalade ESV, downstream left.
- Fits 2005-2006 Chevrolet Silverado 1500 HD, downstream left.
- Fits 2002-2003 Chevrolet Silverado 1500 HD, downstream left.
- Fits 2002-2006 Chevrolet Silverado 2500 HD, downstream left.
- Fits 2002-2006 Chevrolet Silverado 3500, downstream left.
- Fits 2004-2006 Chevrolet Suburban 2500, downstream left.
- Fits 2002 Chevrolet Suburban 2500, downstream left.
- Fits 2005-2006 GMC Sierra 1500 HD, downstream left.
- Fits 2002-2003 GMC Sierra 1500 HD, downstream left.
- Fits 2002-2006 GMC Sierra 2500 HD, downstream left.
- Fits 2002-2006 GMC Sierra 3500, downstream left.
- Fits 2004-2006 GMC Yukon XL 1500, downstream left.
- Fits 2002 GMC Yukon XL 1500, downstream left.
- Fits 2004-2006 GMC Yukon XL 2500, downstream left.
- Fits 2002 GMC Yukon XL 2500, downstream left.
- Fits 2002-2004 Chevrolet Silverado 2500, downstream left.
- Fits 2002-2004 GMC Sierra 2500, downstream left.
- Fits 2003 Cadillac Escalade, downstream left.
- Fits 2003 Cadillac Escalade ESV, downstream left.
- Fits 2003 Chevrolet Suburban 2500, downstream left.
- Fits 2003 GMC Yukon XL 1500, downstream left.
- Fits 2003 GMC Yukon XL 2500, downstream left.
- Fits 2002 GMC Sierra 1500, downstream left.
What This Sensor Helps Address
- Check engine light related to downstream oxygen sensor faults
- Incorrect oxygen sensor signal readings
- Emissions test failures tied to sensor performance
- Rough or inconsistent fuel control caused by a failing sensor
- Replacement needs after sensor aging, contamination, or wiring wear
Installation Notes
Confirm the vehicle year, make, model, and sensor position before ordering. This NTK 21548 oxygen sensor is a specific-fit, threaded replacement, so connector style, harness length, and downstream left or downstream right placement should match the original sensor on the vehicle. For best results, inspect the exhaust threads and wiring routing during installation.
This part cross-references Bosch 15468 and DENSO Auto Parts 234-4286 for the same application.
Quality Assurance
NTK is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier. Each sensor is manufactured and tested to meet or exceed OE specifications for fit and reliability, with OE application support for import and domestic vehicles.
This part fits 66 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Body Type | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2007 | Chevrolet | Silverado 1500 HD Classic | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2007 | Chevrolet | Silverado 2500 HD Classic | — | — | 6.0L | V8 | Downstream Left | B1S2; GMT800 Platform; Classic Models; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2007 | Chevrolet | Silverado 3500 Classic | — | — | 6.0L | V8 | Downstream Left | B1S2; GMT800 Platform; Classic Models; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2007 | Chevrolet | Silverado 3500 HD | Cab & Chassis | — | 6.0L | V8 | Downstream Left | B1S2; GMT900 Platform; New Models; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2007 | GMC | Sierra 1500 HD Classic | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2007 | GMC | Sierra 2500 HD Classic | — | — | 6.0L | V8 | Downstream Left | B1S2; GMT800 Platform; Classic Models; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2007 | GMC | Sierra 3500 Classic | — | — | 6.0L | V8 | Downstream Left | B1S2; GMT800 Platform; Classic Models; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2007 | GMC | Sierra 3500 HD | Cab & Chassis | — | 6.0L | V8 | Downstream Left | B1S2; GMT900 Platform; New Models; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2007 | Pontiac | G6 | — | Manual | 3.9L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2007 | Pontiac | G6 | — | — | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2007 | Saturn | Aura | — | — | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Cadillac | Escalade ESV | Sport Utility | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Chevrolet | Silverado 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Chevrolet | Silverado 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Chevrolet | Silverado 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Chevrolet | Suburban 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | GMC | Sierra 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | GMC | Sierra 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | GMC | Sierra 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | GMC | Yukon XL 1500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | GMC | Yukon XL 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | Cadillac | Escalade ESV | Sport Utility | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | Chevrolet | Silverado 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | Chevrolet | Silverado 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | Chevrolet | Silverado 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | Chevrolet | Suburban 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | GMC | Sierra 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | GMC | Sierra 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | GMC | Sierra 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | GMC | Yukon XL 1500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2005 | GMC | Yukon XL 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | Cadillac | Escalade ESV | Sport Utility | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | Chevrolet | Silverado 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | Chevrolet | Silverado 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | Chevrolet | Silverado 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | Chevrolet | Suburban 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | GMC | Sierra 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | GMC | Sierra 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | GMC | Sierra 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | GMC | Yukon XL 1500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2004 | GMC | Yukon XL 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | Cadillac | Escalade | Sport Utility | — | 6.0L | V8 | Downstream Left | B1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor |
| 2003 | Cadillac | Escalade ESV | Sport Utility | — | 6.0L | V8 | Downstream Left | B1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor |
| 2003 | Chevrolet | Silverado 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | Chevrolet | Silverado 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | Chevrolet | Silverado 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | Chevrolet | Silverado 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | Chevrolet | Suburban 2500 | — | — | 6.0L | V8 | Downstream Left | B1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor |
| 2003 | GMC | Sierra 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | GMC | Sierra 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | GMC | Sierra 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | GMC | Sierra 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2003 | GMC | Yukon XL 1500 | — | — | 6.0L | V8 | Downstream Left | B1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor |
| 2003 | GMC | Yukon XL 2500 | — | — | 6.0L | V8 | Downstream Left | B1S2 California emissions OE equivalent design.; Direct Fit Oxygen Sensor |
| 2002 | Chevrolet | Silverado 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | Chevrolet | Silverado 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | Chevrolet | Silverado 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | Chevrolet | Silverado 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | Chevrolet | Suburban 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Sierra 1500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Sierra 1500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Sierra 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Sierra 2500 HD | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Sierra 3500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Yukon XL 1500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2002 | GMC | Yukon XL 2500 | — | — | 6.0L | V8 | Downstream Left | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| No rows match your filter. | ||||||||
Directly replaces or cross-references 16 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 15468Bosch — 15901Delphi — ES20134DENSO Auto Parts — 234-4286Dorman - HELP — 13694Spectra Premium — OS506875-254275-392575-4062213-1149213-42561920981119209812OS1724SG970SG1678